WebPagetest Forums

WebPagetest Forums > WebPagetest > General Discussion > What's the difference about First Byte between summary and the first of the request?
Full Version: What's the difference about First Byte between summary and the first of the request?
You're currently viewing a stripped down version of our content. View the full version with proper formatting.

Tom Qi

01-22-2018, 05:21 PM
Hi
There are two First Byte time,one is in the summary result about the page and another is in the first of the request details. What's the difference of them? In my opinion, they should be same.
Thanks

pmeenan

01-28-2018, 03:14 AM
The summary TTFB is from the start of navigation until the first byte of HTML for the page is returned and includes DNS, connect, SSL negotiation and any redirects.

At a request level the TTFB is just the time from when the request was sent to the server until a response starts coming back (connection, dns, etc are not included).

Tom Qi

01-31-2018, 01:08 PM
(01-28-2018 03:14 AM)pmeenan Wrote: [ -> ]The summary TTFB is from the start of navigation until the first byte of HTML for the page is returned and includes DNS, connect, SSL negotiation and any redirects.

At a request level the TTFB is just the time from when the request was sent to the server until a response starts coming back (connection, dns, etc are not included).

Thank you!
WebPagetest Forums > WebPagetest > General Discussion > What's the difference about First Byte between summary and the first of the request?
Reference URL's